20165487 has 8 divisors (see below), whose sum is σ = 26925360. Its totient is φ = 13424640.

The previous prime is 20165477. The next prime is 20165489. The reversal of 20165487 is 78456102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20165487 - 2⁴ = 20165471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2064 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (3365670).

Almost surely, 2^20165487 is an apocalyptic number.

20165487 is a deficient number, since it is larger than the sum of its proper divisors (6759873).

20165487 is an equidigital number, since it uses as much as digits as its factorization.

20165487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9513.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20165487 is about 4490.5998485726. The cubic root of 20165487 is about 272.1883742326.

It can be divided in two parts, 2016 and 5487, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 20165487 in words is "twenty million, one hundred sixty-five thousand, four hundred eighty-seven".